Improvement in cylinder-cocks



NI'IED STATES;

DAVID B. DENNISON,

IMPROVEMENT IN OF OTTUMWA, IOWA.

CYLINDER-COCKS.

Specification forming part of Letters Patent No. 136,221, dated February 25, 1873.

To all whom it may concern:

Be it known that 1, DAVID B. DENNISON, of Ottumwa, in the county of VVapello and in the State of Iowa, have invented certain new and useful Improvements in Cylinder- Oocks and do hereby declare that the following is a-full, clear, and exact description thereof, reference being had to the accompanyin g drawing and to the letters of reference marked thereon making a part of this specification.

The nature of my invention consists in the construction and arrangement of a cylindercock for locomotive-engines, as will be herein after more fully set forth.

In order to enable others skilled in the art to which my invention appertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in which Figure 1 is a side elevation of the front part of a locomotive, showing the cylinder with the cocks in position. Fig. 2 is a longitudinal section, and Fig. 3 a side View, of the cock in enlarged dimensions.

A represents the tube or barrel of the cock, in which is a valve-seat, a, and below the same is the outlet B. U represents the valve resting upon the seat a and opening upward, so that when open a communication is had from the interior of the cylinder with the outlet B, the upper end of the barrel A being screwed into the cylinder. 1) is the valve-stem attached to the under side of the valve 0 and extending down through the lower artof the barrel I Ainto a mortise made in the extreme end thereof. E represents the cylinder, at each end of which is one of these cocks, as shown in Fig. 1. Through the mortises in the extreme lower ends of the two barrels or tubes A A passes a rod or bar, D, the upper surface of which is provided with two inclines at d d, the ends of the stems b b resting upon the same so that when the bar is moved in one direction said inclines will push the valve-stems upward, opening the valves, while, when the bar is moved in the opposite direction, the pressure from the interior of the cylinder will close the valves. The bar D is, by a rod, 0, connected with a pivoted lever, G, or, as it is called, the cylinder-cock shaft, and from the upper end of the same a rod, H, runs to the cab of the locomotive.

When the rod H is drawn back the barD is moved forward, raising the valves at one time. Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, 'is- The cocks A A, in combination with the beveled bar D, the valve-stems of said cocks being operated upon simultaneously by said bar at the will of the engineer, all arranged substantially as herein set forth. v

In testimony that I claim the foregoing I have hereunto set my hand this 30th day of November, 1872.

DAVID B. DENNISON. Witnesses:

W. J. MITCHELL,

JOHN M. RONEY.

D. B. D EN N I SO N.

Cylinder Docks.

N0.136,221. Patented Feb.25,1873.'

I ventor.

Witness Attorneys. 

